Disinfection byproducts · 2025
HAA5 in Hampton, VA tap water
Hampton, VA's 2025 report shows HAA5 detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Maximum Max Conc | 21 | 0 MCLG |
Range System-wide | 0–7.8 | 0 MCLG |
Range Range of Individual Test Results Low | 5–32 ug/L | 0 ug/L MCLG |
Range System-wide | 0–7.8 ug/L | 60 ug/L MCL |
Highest single sample Max Conc | 7.8 | 0 MCLG |
Range System-wide | 5–32 | 0 MCLG |
Maximum Max Detected Level | 7.8 ug/L | 60 ug/L MCL |
Reported level System-wide | 21 ug/L | 0 ug/L MCLG |
Verbatim from Hampton, VA's 2025 Consumer Confidence Report — source document ↗
About HAA5
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.
Long-term exposure above the federal limit is associated with an increased cancer risk.
How Hampton, VA compares
5 of the 377 systems measuring HAA5 on The Water Map have it at or above the federal limit:
Nearby systems also reporting HAA5:
People also ask
+Is there HAA5 in Hampton, VA tap water?
Yes — Hampton, VA's 2025 Consumer Confidence Report lists HAA5 at 5–32 ug/L. Hampton, VA's 2025 report shows HAA5 detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for HAA5 in drinking water?
The federal MCLG for HAA5 is 0 . The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is HAA5?
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk.
+Which other U.S. cities have HAA5 over the federal limit?
5 of the 377 systems on The Water Map measuring HAA5 report it at or above the federal limit. Examples include Albuquerque, NM, Columbus, OH, Hollywood, FL.
+Where does this HAA5 measurement come from?
This page reproduces the HAA5 entry from the 2025 Consumer Confidence Report published by the Hampton, VA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/va/hampton/2025/source.